Ultrafiltration application of cellulose acetate–polyurethane blend membranes

Sivakumar, M.; Malaisamy, Ramamoorthy; Sajitha, C.J; Mohan, D.; Mohan, V.; Rangarajan, R.

doi:10.1016/s0014-3057(98)00262-6

Cited by 85 publications

(45 citation statements)

References 9 publications

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“…However, the result shows that the % rejection for all the blend membranes is more than 80% for different molecular weights of dextrin's. The (Sajitha et al, 2003;Sivakumar et al, 1999) and Cellulose Acetate/carboxylated Polysulfone (Thomas et al, 1992).…”

Section: Molecular Weight Cut-off (Mwco)mentioning

confidence: 99%

Preparation and Performance Studies on Polyethersulfone Ultrafiltration Membranes Modified With Gelatin for Treatment of Tannery and Distillery Wastewater

Velu

Loganathan

Arthanareeswaran

2015

Braz. J. Chem. Eng.

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-In this study polyethersulfone ultrafiltration membrane were prepared with the modifier gelatin at 0, 5, 10, 15 and 20 wt % using DMF as solvent by phase inversion process. Morphologies and characteristics of the membranes were investigated through the methods of SEM, XRD, contact angle measurements. The performance of the modified membrane for the treatment of leather and distillery wastewater through a deadend ultrafiltration process was studied. Morphological investigation showed that the 10% gelatin content in 90% PES results in a two layer structure with a porous top and homogeneous sub-layer with uniform number of pores on the surface. The pure water flux of the modified membrane increases with gelatin concentration, which results in better permeation for both leather and distillery wastewater. In addition to 80-90% reduction in BOD and COD, all modified PES UF membranes showed moderate removal of total suspended and dissolved solids, chlorides, sulphate, oil and grease, potassium, sodium and ammonical nitrogen, apart from color removal.

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Section: Molecular Weight Cut-off (Mwco)mentioning

confidence: 99%

Preparation and Performance Studies on Polyethersulfone Ultrafiltration Membranes Modified With Gelatin for Treatment of Tannery and Distillery Wastewater

Velu

Loganathan

Arthanareeswaran

2015

Braz. J. Chem. Eng.

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“…(13), (14), and (15) are reported in Table 4. From the table, it is seen that r m decreases from 0.068 to 0.043 µm for PSf/NMP system and from 0.05 to 0.036 µm for PSf/DMAc system.…”

Section: Water Permeation Testmentioning

confidence: 99%

“…Mahendran et al [14] prepared membranes based on CA and epoxy resin with and without PEG 600 and found that concentration of PEG 600 has major influence on the ultrafiltration characteristics of the membranes prepared. Sivakumar et al [15] in their study, showed the effect of concentration of the additive, PVP on the performance of cellulose acetate/polyurethane blend membranes.…”

Section: Introductionmentioning

confidence: 99%

SEM analysis and gas permeability test to characterize polysulfone membrane prepared with polyethylene glycol as additive

Chakrabarty

Ghoshal

Purkait

2008

Journal of Colloid and Interface Science

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“…High applied pressures are intrinsic to RO membrane processes and external surface fouling further increases the required feed pressure. High feed pressures damage polymeric membranes internally due to physical compaction of the porous support membrane [6][7][8][9]. Subjecting a polymeric membrane to high operating pressures reorganizes the membrane macrovoid structure and results in reduced void volume and increased hydraulic resistance [10].…”

Section: Introductionmentioning

confidence: 99%

Using nanocomposite materials technology to understand and control reverse osmosis membrane compaction

et al. 2010

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Composite reverse osmosis (RO) membranes were formed by interfacial polymerization of polyamide thin films over pure polysulfone and nanocomposite-polysulfone support membranes. Nanocomposite support membranes were formed from amorphous non-porous silica and crystalline microporous zeolite nanoparticles. For each hand-cast membrane, water flux and NaCl rejection were monitored over time at two different applied pressures. Nanocomposite-polysulfone supported RO membranes generally had higher initial permeability and experienced less flux decline due to compaction than pure polysulfone supported membranes. In addition, observed salt rejection tended to increase as flux declined from compaction. Crosssectional SEM images verified significant reduction in thickness of pure polysulfone supports, whereas nanocomposites better resisted compaction due to enhanced mechanical stability imparted by the nanoparticles. A conceptual model was proposed to explain the mechanistic relationship between support membrane compaction and observed changes in water flux and salt rejection. As the support membrane compacts, skin layer pore constriction increased the effective path length for diffusion through the composite membranes, which reduced both water and salt permeability identically. However, experimental salt permeability tended to decline to a greater extent than water permeability; hence, the observed changes in flux and rejection might also be related to structural changes in the polyamide thin film.

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Ultrafiltration application of cellulose acetate–polyurethane blend membranes

Cited by 85 publications

References 9 publications

Preparation and Performance Studies on Polyethersulfone Ultrafiltration Membranes Modified With Gelatin for Treatment of Tannery and Distillery Wastewater

Preparation and Performance Studies on Polyethersulfone Ultrafiltration Membranes Modified With Gelatin for Treatment of Tannery and Distillery Wastewater

SEM analysis and gas permeability test to characterize polysulfone membrane prepared with polyethylene glycol as additive

Using nanocomposite materials technology to understand and control reverse osmosis membrane compaction

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